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IMPROVEMENT ON ACCELERATED PAINT FILM WEATHERING TEST METHOD

One of the major problems of current accelerated weathering methods is difficulty of reproducing the results of in-use exposure. This paper reports a microanalytic method used to improve that reproducibility. For that purpose, electron-microscopic observations were performed of coating surface degradations caused by various accelerated weathering methods and those induced by outdoor exposures, along with those of in-use car panels, thereby identifying differences in film degradation forms. The accelerated weathering tests demonstrated the effects that the wavelength distribution of radiation, temperature, water feeding procedure, etc. had on loss of gloss, fading, and film surface degradation forms, especially a great effect of ultraviolet light on such failures. It was based on analytic results of such environmental factors that the accelerated testing conditions including wavelength distribution of the radiation, water feeding, temperature, etc. were improved, thus making possible better evaluation and prediction of gloss retention life of solid coatings.

  • Supplemental Notes:
    • Twentieth FISITA Congress, (SAE P-143), The Automotive Future, Volume 3, Austria, 6-11 May 1984.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Tsurui, M
    • Takato, M
    • Nakata, T
  • Publication Date: 1984-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00392561
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 845085, HS-037 458
  • Files: HSL, USDOT
  • Created Date: Feb 28 1985 12:00AM